Back in middle school after summer vacation, Greg Heffley and his older brother Rodrick must deal with their parents' misguided attempts to have them bond in the Diary of a Wimpy Kid: Rodrick Rules DVD.

Wimpy Greg Heffley (Zachary Gordon), now in seventh grade, thinks he has it all together. He has mastered middle school and gotten rid of the Cheese Touch. However, Greg's older brother, Rodrick (Devon Bostick), is itching to cut him down to size. He gets the perfect opportunity when their mother (Rachael Harris) tries to force the boys to bond. Rodrick may be Greg's chief tormentor, but he feels his constant pranks are just what his little brother needs to prepare him for life's hard knocks.

Greg and Rodrick don't get along, and his parents are fully aware of that. In order to help them get along, Greg's mother introduces Mom Bucks, which rewards them for getting along. But Rodrick isn't the only problem. He has to deal with any conflicts involving Holly Hills, as well as other embarrassing situations. Will Greg and Rodrick get along?